code: def __len__(self):
      return len(self.y)
  
file_path: nni/examples/nas/legacy/notebooks/utils.py
imports: import os
  import torch
  import pandas
  from sklearn.preprocessing import LabelEncoder
  from torchvision.datasets.utils import download_url
label_desc: Use image node_id 2 for calling the TitanicDataset obj's underlying member method code with example usage: obj.__len__() and returns: len